Minutes interim-2022-core-03: Thu 16:00
minutes-interim-2022-core-03-202202241600-00

# CoRE Virtual interim - 2022-02-24 - 15:00 UTC

Chairs:

* Marco Tiloca, RISE
* Jaime Jiménez, Ericsson

## Remote instructions

Material: https://datatracker.ietf.org/meeting/interim-2022-core-03/session/core
Meetecho:
https://meetings.conf.meetecho.com/interim/?short=dca7677a-a7e4-4f63-812a-19b9a041c958
Jabber: core@jabber.ietf.org Notes:
https://notes.ietf.org/notes-ietf-interim-2022-core-03-core

Minute takers: Christian Amsüss, Marco Tiloca
Jabber scribes: Marco Tiloca

## Agenda

### Note Well

Remember that the [note well](https://datatracker.ietf.org/submit/note-well/)
applies, for [IPR](https://tools.ietf.org/html/bcp79) but also for [WG
processes](https://tools.ietf.org/html/bcp25) and [code of
conduct](https://tools.ietf.org/html/bcp54). Please be nice to each another.

MT doing introductions.

### Jabber & Minutes / Agenda bashing

## CORECONF

* https://datatracker.ietf.org/doc/draft-ietf-core-yang-cbor/
* https://datatracker.ietf.org/doc/draft-ietf-core-sid/

We need progress on the Yang-SID/Yang-name relationship:
<https://mailarchive.ietf.org/arch/msg/core/QPzjacnl9DUTfIYUWXoKKUcHxks>

MT: Not much on the list ... anything in the background?
CB: Had meeting with authors, ADs and YANG people. Discussed yang-catalog.org
support for SID files. Halfway, decided that it's necessary to write that up in
core-sid document. Substantial chunk. Will need another last call, maybe just
IETF last call. CB: Told Rob Wilton that normative reference from yang-cbor to
core-sid is a mistake ... not immediately rejected, needs discussion with him,
maybe yang-cbor can get through. We will have another yang-sid update, maybe
even telechat. But that will allow us to get information that was previously
negotiated with IANA who doesn't have the budget to do it, and yang-catalog.org
does have it.

## HREF & CoRAL

* https://datatracker.ietf.org/doc/draft-ietf-core-href/
* https://datatracker.ietf.org/doc/draft-ietf-core-coral/

MT: Did see some activity around HREF on Github
CB: Still adjusting implementations, it takes long because it's hard to find
time. MT: Revision before cut-off that can be ready for WGLC? CB: Aspirational
goal.

CA: No updates on CoRAL.

## CoAP Attacks

* https://datatracker.ietf.org/doc/draft-mattsson-core-coap-attacks/
* Ready for WG Adoption Call?

MT: Discussion at previous interim emphasizing that it is important but also
indicating a split to happen (what needs to happen now in CoRE vs. research PoV
for now). MT: Now we have a document "attacks on CoAP" in here for which there
seems to be consensus to work on here; "attacks using CoAP" was moved to T2TRG
as a different document. MT: Any objection to adopt as informational document
in CoRE? (heard none) MT: We will start a 2-week call for WG adoption on the
list for this informational document.

(CB: was distracted, but WGA has my full support!)

## Conditional Attributes

* https://datatracker.ietf.org/doc/draft-ietf-core-conditional-attributes/

Presented slides:
https://datatracker.ietf.org/meeting/interim-2022-core-03/materials/slides-interim-2022-core-03-sessa-conditional-attributes-for-constrained-restful-environments-00.pdf

BS submitted new version; presenting slides.
BS: (note: has been split out from the dynlink document)
BS: band now boolean (presence-only)
CB: Compare integer values, what if there is a non-integer string? Empty value
is not defined very well. We're using "attribute" that is not really well
defined in the first place. When we've defined attribute ("query parameter used
in a particular way"), we can make a better statement. Defining attributes
(based on query parameters) can also help other documents that use query
parameters.

BS: Proposed text now "SHOULD use Max-Age", let's go with that, it's in -02 now.

BS (p5): Do we need a registry with these names?
CA: Makes sense to define general use attributes/parameters? (Think "don't
usurp application namespace", not sure of relevant RFC number) CA: But yeah, if
it's opt-in for interfaces, it'd be OK. CB: Had conflict with lt previously

CA: If going to be general "attributes in interfaces CoRE defines", it might
update RD and take over its registry. Not sure if it is a good idea, but we
should consider. BS: Taking this offline.

MT: Good to submit an updated version including what was discussed today and
present it at IETF 113 (including summary from today). Then it should be ready
to move on to WGLC. BS: Will do.

## Transport Indication

* https://datatracker.ietf.org/doc/draft-amsuess-core-transport-indication/

Presented slides:
https://datatracker.ietf.org/meeting/interim-2021-core-13/materials/slides-interim-2021-core-13-sessa-coap-protocol-indication-00

CA presenting (slides from previous interim meeting to recap)

CA: Received reviews from Klaus and Marco; working on those
CA: Apparent aliasing on the wire, but client and server know what is really
going on - To be clarified CB: Can we ensure that the aliasing-related
statement is originated from the server? CA: Depends on the
application-specific security model. If the application wants absolute
ensurance of no traffic redirection, there is need for special care. Otherwise,
trusting secure communication with OSCORE would suffice. CB: Would like to have
section in seccons for that. CA: Will do. CB: "Web address translator" as new
term to introduce? CA: Kind of feel it's not good, maybe ...

CA: Also have to clarify the use of "hosts". Happy to hear about possible
easier approaches to use.

CA: How do we move on from here?

MT: Important work, I personally believe it would be good to happen in the WG.
Good anyway to have a revised version for IETF 113 addressing the reviews and
the points from today. MT: What do people here think? Good approach overall?
Objections? CB: Promised to solve the problem 5 years ago; this is a possible
approach and so far the most promising one. I support this. MT: Looking forward
to a revised version.

### AOB

MT: We meet again next week on 2022-03-02 15:00 UTC (typical time unlike
today); that's the last interim before IETF 113 where we have a 2-hour session.

---

*[MT]: Marco Tiloca
*[JJ]: Jaime Jiménez
*[FP]: Francesca Palombini
*[JPM]: John Preuß Mattsson
*[CB]: Carsten Bormann
*[CA]: Christian Amsüss
*[KH]: Klaus Hartke
*[RH]: Rikard Höglund
*[TF]: Thomas Fossati
*[DN]: David Navarro
*[GS]: Göran Selander
*[BS]: Bilhanan Silverajan
*[AS]: Alan Soloway
*[MCR]: Michael Richardson
*[AK]: Ari Keränen
*[MJK]: Michael Koster
*[JM]: John Mattsson
*[NW]: Niklas Widell
*[ED]: Esko Dijk
*[EB]: Henk Birkholz
*[ST]: Sean Turner
*[ML]: Martine Lenders
*[MW]: Matthias Wählisch